Include settings.root in the URL prefix when loading

This should fix issue #6. I'm not sure how the isDojo case should be handled though.
Fixed broken tests and added 2 that test the root setting.

Added " (nested)" to nested template because I wanted to be certain the virtual path was still working properly.
Merge pull request #7 from zephyrweb/patch-1

Include settings.root in the URL prefix when loading